I'd say no...
... but it depends if you pull forward into him, your fault, if he collides with the side of your car his.
This said 9 times in 10 the motorist will be to blame for not being aware of the hazard, this people walking into the road, if you hit one it's your fault even though they walked out on you.
Also whilst you can't legally cycle on a footpath, not all paths are footpaths; you get a lot of shared paths these days where you can legally cycle and walk.